cal sil board is great stuff, I underatand many of the builders like it because it gives you a nice flat surface to lay your oven floor on, It also saves you mixing ther vermicrete floor which can be a little difficult... I mixed my vermicrete floor in a small cement mixer, which I've read is frowned upon, But it seemed to work fine for me and 6 months later still no problem.. If I were to do it again, I would go with the cal sil board just for the easier factor, Plus, someone correct me if im wrong,, you'll only need 2 inches of cal sil whereas 4 inches of vermicrete is recommended..

__________________ My geodesic oven project: To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts., To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

I did the vermicrete, at the time (2 1/2 yrs ago), the boards were pretty costly (about triple the cost of vermiculite concrete). Now that FB is importing them (as well as others), the cost has dropped considerably - although still a premium over the vermiculite, from what everyone says, it more than offsets the additional cost with time savings and ease of use. I would go for the board.

No part of this website or content thereof may be reproduced, distributed or transmitted in any form or by any means, nor may any part of this website be stored in a database or other electronic retrieval system, or any other website, without the prior written permission of Forno Bravo.